<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>背景图像的裁剪区域</title>
		<style type="text/css">
			div{
				width: 500px;
				height: 300px;
				border: 50px dashed #116699;
				padding: 30px;
				background: #cbe8f9 url(img/td.jpg);
				background-size: cover;
				background-origin: border-box;
				background-clip: border-box;
			}
		</style>
	</head>
	<body>
		<div>
		</div>
	</body>
</html>